determine whether the shapes of the following graphs of quadratic function is u or n a) f (x) = x² - 4x + 1

see explanation

Step-by-step explanation:

Given a quadratic in standard form

f (x) = ax² + bx + c : a ≠ 0

• If a > 0 then minimum value U

• If a < 0 then maximum value ∩

f (x) = x² - 4x + 1 ← is in standard form

with a = 1 > 0

Thus f (x) = x² - 4x + 1 has a minimum value U